Since as you stated you are not a handy man, you would be wise to call an appliance repairman. I suspect that the fluid is transmission lube, and if it is, a new DW is in your future. You might want to just forget the repairman and get a new DW anyway since, as others point out, your machine is really at the end of its life expectance. An ethical repairman would probably point out that it would not be economically wise to put half the price of a new machine in this one just to gain another year or so, but you would have to pay him for his service call.